Il Vecchio, along the lake front in Seattle's Leschi neighborhood, is now closed.
I understand that they had a final exhibit of French constructeur bikes (Rene Herse and Alex Singer) about 10 days ago and then closed.
Based on the Yelp reviews, some people found it too "boutique-y." But I always thought it was super - you could wander in, look at all the cool bikes on display, and linger to your heart's content. The owner (George) was behind the counter if you needed help or wanted to chat. He has a very deep knowledge of classic bikes.
I'll miss the shop - was always a nice place to stop during a ride along Lake Washington.
Here is a Flickr gallery I found of the final display, "The Art of the Constructeur Bicycle," which I think was put together by Jan Heine, editor of Bicycle Quarterly: